unionize rocketship?" what would you say? >> i would say absolutely not-- we're a startup. you know, in startups you basically do something different every day. any major school district has a 450-page kind of contract that literally says minute by minute what teachers are supposed to do. so the fit between how that's evolved and what rocketship is like is just-- a bad fit. >> reporter: no union, is that a problem? >> i'm making more money than i made when i was part of a union. i have more job security than i would say then when i was part of a union. so i'm not sure what i would need a union for. >> reporter: with no union contract, rocketship can decide what to pay teachers. andrew elliott-chandler is the principal of rocketship si se puede elementary. >> i was excited to offer some of our third-year teachers doing well almost $70,000 this year. >> reporter: that's almost 30% higher than a third year teacher earns in a neighboring district. rocketship teachers typically make at least 15% more, thanks to